Arbovirus infections in Ceylon.
The haemagglutination-inhibition test has been used to assess the frequency of arbovirus infections in the population of Ceylon, by age-group, and also in some animals. The antigens used were: chikungunya, JE, dengue 1, 2, 3, 4, and Tahyna.The percentage of positive reactors to the group-B viruses ranged from 16.3% to 84.6% and was lower in the mountainous part of the country. Infections with the chikungunya (group-A) virus were less frequent (from 0 to 37%) and were considered to be recent infections. The prevalence of antibodies was found to increase with age.From a comparison of the antibody titres of the indigenous Ceylonese population with those of a group of immigrant Yugoslav workers it was concluded that a titre of 1:640 would represent a significant titre for a recent infection.The animals examined included goats, cattle, bandicoots, pigs and sheep; virus infections were most frequent in the bandicoots, pigs and sheep.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000820:Animal Diseases / Q000175:diagnosis; D000818:Animals; D000937:Antigen-Antibody Reactions; D000941:Antigens / Q000008:administration & dosage; D001102:Arbovirus Infections / Q000175:diagnosis / Q000453:epidemiology* / Q000662:veterinary; D002417:Cattle; D002648:Child; D002675:Child, Preschool; D004641:Emigration and Immigration; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008875:Middle Aged; D012424:Rural Population; D013188:Sri Lanka; D014505:Urban Population; D015022:Yugoslavia
D000941:Antigens